Hi Christoph, > On Aug 25, 2020, at 2:23 PM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > > On Fri, Aug 21, 2020 at 08:32:20PM +0800, Kai-Heng Feng wrote: >> New Intel laptops with VMD cannot reach deeper power saving state, >> renders very short battery time. > > So what about just disabling VMD given how bloody pointless it is? > Hasn't anyone learned from the AHCI remapping debacle? > > I'm really pissed at all this pointless crap intel comes up with just > to make life hard for absolutely no gain. Is it so hard to just leave > a NVMe device as a standard NVMe device instead of f*^&ing everything > up in the chipset to make OS support a pain and I/O slower than by > doing nothing? >From what I can see from the hardwares at my hand, VMD only enables a PCI domain and PCI bridges behind it. NVMe works as a regular NVMe under those bridges. No magic remapping happens here. Kai-Heng
